7897287 has 4 divisors (see below), whose sum is σ = 10529720. Its totient is φ = 5264856.

The previous prime is 7897283. The next prime is 7897321. The reversal of 7897287 is 7827987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7827987 = 3 ⋅2609329.

It is not a de Polignac number, because 7897287 - 2² = 7897283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316212 + ... + 1316217.

It is an arithmetic number, because the mean of its divisors is an integer number (2632430).

Almost surely, 2^7897287 is an apocalyptic number.

7897287 is a deficient number, since it is larger than the sum of its proper divisors (2632433).

7897287 is a wasteful number, since it uses less digits than its factorization.

7897287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632432.

The product of its digits is 395136, while the sum is 48.

The square root of 7897287 is about 2810.2112020273. The cubic root of 7897287 is about 199.1403687980.

The spelling of 7897287 in words is "seven million, eight hundred ninety-seven thousand, two hundred eighty-seven".